Friction drive-chain.



PATENTED JULY 21; 1908,.

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UNITED STATESPATENT OFFICE.

nnwaan J. CONKLIN, or WALDENKNEW YORK, ASSIGNOR, BY MESNE issienmnu'rsfro wrrrrN r MANUFACTURING CQMPANY, OF HARTFORD, CONNECTICUT, A CORPORATION."

muo'rron na ve-exam.

Patented .rul 21, 1908.

Applicat filed. June 28, 1907. Serial No. 881,187.

To all uhom it may wonccrn."

Be it known that I, EDWARD J. CoNKLIN, a

citizenl'of the United States of America, re-

siding at Walden, in the county of Orange and State'of- New York, have invented new anduselu-l Improvements in Friction Drive- Qhams, of which the following is a specification.

' This invention relates to improvements in coverin s for drive-chains or link-belts, and

especial y to the class which employs leather for the wearing faces, or some analogous ma.-

terial, in order. to lessen the'nois'e while in operation, and also to increase the frictional {bearing surface between 1 the belt and the 1 pull I" the drawings forming part of this application :Figure 1 is a planview of thefinished chain. as applied to a pulley which has a roove for receiving the same. Fig. 2 is a ongitiidinal sectional view on the line 2 2, Fig. i. r Fig. 3 is a transverse section on the line. 3.-3, Fig. 2, in which the bolt is provided with a thread at one end for'receiving 5 a nut in order that the pieces may be drawn together and secured to the links of the chain. This view represents the point at which the belt is'to be separated when placing the same on the pulley. Fig. 4. is a transverse section on line 44, Fig. 2 in which the rivet for securing the pieces together is shown. Fig. 5 is a transverse section on line 5-5, Fig. 2 of amodification showing the completed belt in place and in the groove of 5 the pulley. Fig. 6 is a modification in which only a single piece of leather is used for covering the inside and side portions of the chain. Fig. 7 shows the position of the inclosing side pieces for the links before the 40 same are bentinward against the plates of the chain. Fig. 8 is a transverse sectional view similar to Fig. 3 but showing a different form of nut and provided with a knurled edge so that the same is prevented from loosening after being secured in place onthe bolt. Fig. Qis a detailed view of this nut. Fig. 10 is a detailed view of a modified form of nut for securing the bolt and so shaped as to prevent ,working loose when in place. Reference to Fig. 3 will show this formof nut in lace.

' Feferring to the drawings 1n detail, a desighates the side-plates of the drlve-chain, and b the blocks thereof that are secured to the plates (L by means of the usual rivets c.

d designates a piece or blockof leather that is placed on the inside of the chain in contact with the side-plates a, having the laterally projecting wing portions e, as shown'in Fig.

7, extending from opposite sides of the'chain.

f desiglnates a second piece .or blockof leather t at is laced below and in contact with the piece g designates a third piece or block of leather,

rectangular in cross section and placed on the upper sideof the plates 0. The length of the wingpieces e. is such that when folded inward toward the plates, they will lieunder the iece g, the outer surface of the wing being ush with the outer edge of the plates of the pieces g, as clearly shown in Figs.- 3, 4,

and -8, as shown at g. A rivet hextends through the 'ieces f, d, and g and through the oening int c chain between the blocks 1) w ereby the ieces or blocks of leather are firmly secure :to the chain.

By referring to Fig. 2 it will be seen that the ends of the pieces f, d, and g in sectional elevation, are inclined from each other so that spacesi and j are formed between each link in order that the chain may bend during its engagement with the curved surface of the pulley. i

In the form of covering for the chain shown in Figs. 2, 3, 4, 5, 7, and 8, I em 10y twothicknesses, as d and j; on the insi e of the chain, while in Fi 6-, which is a modified form, only one thickness of covering is shown and it is designated bythe letter 70. This piece is bent inward towards, and in contact with the sides of the plates a in the same manner as that above described, and the rivet 'h is passed between the plates a and through the-coverin k. This form of covering is the same as that described above, exce t that the iece f is omitted.

n Fig.- 5, t e wing portions e of the iece (1, instead of engaging the under side 0 the block g of leather or being pressed beneath the piece are extended flush with the top or outer su ace of'the block g, as clearly indicated. a In order to fasten the ends of the chain together firmly and at the same time permit easy separation, I employ a nut m (shown in detail in Fig. 9) which is provided with a conical side and a knurled surface 11. whereby when the bolt 72. is screwed into the nut and drawn into the piece 9, flush with the upper surface, as shown in Fig. 8, there is no danger of the nut working loose' and becoming detachedfrom the bolt since itlie knurled surface it v of the nut will embed itself in the leather. v The bolt can not become lost or detached on account of its head end bearing against the bottom of the groove in the pulleyaf Fig. 10 shows a modified construction of.

the form of nut forthe bolt hwhich is designated by the letter 0. This nut is provided with the vertical sides p and the chamfered edger so that when the bolt his rotated and the nut drawn'into the leather piece g flush with the outer surface thereof, there is no danger of the bolt becoming loosened by the unthr'eading of thenut therefrom.

" The transverse section of the pulley, shown in'Fig. 5, is provided with inclined flanges s,

I the inclination of which practically correplates and a casing therefor comprising a series of pieces secured to the inner surface of the blocks and plates of said chain, and asec- 0nd series" of pieces secured to the outer sura face of the same, the first series of pieces being bent inward against the sides of the chain and into contact with the second series of pieces, and means for securing said pieces to the blocks and plates of the chain, as described.

2; A drive-chain comprising blocks and plates and a. covering therefor comprising blocks of leather secured to the inner. and outer portions of the blocks and lates of the chain, the blocks of leather on t e inner surface of the chain being bent against the sides of the chain and into contact with the blocks of leather on the outer surface of the chain, the sides of the covering being inclined.

3. .A drive-chain com rising blocks and plates and a covering th piecesof leather secured to the inner-and outer sulfaces of the blocks and plates of the.

chain, one set of pieces engaging the inner and side portions of the chain, another set of pieces engaging the outer surface of the chain and the first mentionedlset of ieces, and a third set of pieces secured to t e inner surface of the first mentioned pieces, and means for securing said pieces to the individual blocks and plates comprising the chain, as described.

EDWARD J. CONKLIN.

Witnesses:

CYRUS B. FOWLER, W.'J. BELOHER.

erefor comprising 

